Counting with Groups of 10 (Catalano)

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Addresses Standard: 1.NBT.B.2 This excerpt from a larger lesson is an introduction to place value for first grade students. The video begins after students have worked in groups to count out large numbers of popsicle sticks for a class project (footage not available). The class discusses and explores how making groups of ten makes it easier for mathematicians to count because it is an organized and efficient way to count large numbers of objects. This lesson exemplifies various indicators from all three Core Actions. 

This video was annotated using this version of the Instructional Practice Guide (IPG). A current version of the IPG is available here.

Counting with Groups of 10 (Catalano)

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0:31 – 11:06
Core Actions & Indicators: 2A

2A: The teacher introduces the learning target for the lesson and the class discusses why mathematicians count by tens.  The teacher makes the math explicit by: a) planning a hands-on opportunity to count a large number of objects (not included in video footage); b) referencing an organized chart the class uses to keep track of days in school; c) modeling how to count out and circle a group of 10 to count a group of objects; d) allowing students to come up and model how to count out and circle a group of 10 to count objects, and e) connecting these pictorial representations to a number sentence. This variety of instructional techniques help make the mathematics of the lesson clear for all students.
15:06 – 20:05
Core Actions & Indicators: 3C, 3G

3C, 3G: During independent work time, the teacher checks in with multiple students to reinforce the targeted learning.  Rather than pointing out errors explicitly, the teacher allows students to explain their work, and asks questions to guide student thinking and prompt revisions to student work.